[cfe-dev] Macro expansion weirdness (or bug?)

[Abramo Bagnara]

Il 26/03/2010 18:07, Chris Lattner ha scritto:
> 
> On Mar 25, 2010, at 4:32 PM, Abramo Bagnara wrote:
> 
>> Il 25/03/2010 20:43, Chris Lattner ha scritto:
>>>
>>> On Mar 25, 2010, at 12:08 PM, Abramo Bagnara wrote:
>>>
>>>>
>>>> From your message it seems you're expecting *more* callback
>>>> invocations in the first sample, while I'd expect *less* callback
>>>> invocations in the second sample.
>>>>
>>>> Could you explain better your position?
>>>
>>> My position is basically that the preprocessor is incredibly
>>> scary/confusing and implementing it damaged me.  :)
>>>
>>> I don't recall enough of the details to really say which way is right
>>> or wrong, but tokens coming out at -E is a good indicator that the
>>> right thing is happening.
>>
>> Indeed it was missing further expansion disabling in a case where
>> isTrivialSingleTokenExpansion is true.
> 
> Please provide a testcase that this fixes with -E.

... such a man of little faith :-D

#define n(v) v
#define l m
#define m l a
n(m)


-- 
Abramo Bagnara

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